We demonstrate experimentally the efficient control of light intensity distribution inside a random scattering system. The adaptive wave front shaping technique is applied to a silicon waveguide containing scattering nanostructures, and the on-chip coupling scheme enables access to all input spatial modes. By selectively coupling the incident light to the open or closed channels of the disordered system, we not only vary the total energy stored inside the system by a factor of 7.4, but also change the energy density distribution from an exponential decay to a linear decay and to a profile peaked near the center. This work provides an on-chip platform for controlling light-matter interactions in turbid media.
R. Sarma et al., "Control of Energy Density inside a Disordered Medium by Coupling to Open or Closed Channels," Physical Review Letters, vol. 117, no. 8, pp. 086803-1-086803-5, American Physical Society (APS), Aug 2016.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevLett.117.086803
Keywords and Phrases
Atomic Physics; Adaptive Wave Fronts; Control Of Energies; Efficient Control; Energy Density Distributions; Exponential Decays; Light Intensity Distribution; Light-matter Interactions; Random Scattering, Wavefronts
International Standard Serial Number (ISSN)
Article - Journal
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